Features:
- Added TeamWithdrawEvent, TeamDepositEvent and TeamDisallowedPvpEvent ( #613) - Credit Hellinduction
- Added a title message when allying another team ( #629) - Credit svaningelgem
- Only tab complete teams that are allies for /team neutral ( #632) - Credit svaningelgem
- Added /teama importmessages to import translations from "missingmessages.txt"

Improvements:
- Added missing Spanish messages (both translations) - Credit LeadVic
- Added missing Italian messages - Credit YnsanitY
- Added missing Polish translations - Credit Rain
- Added missing Vietnamese translations - Credit Iamsad_VN

Bug Fixes:
- Fixed typo in config.yml ( #620) - Credit dacoder101
- Fixed issue where the clickable invite message's command was not translatable ( #602)
- Fixed null pointer being thrown in unexpected way ( #634)
- Improved logging for /team baltop error ( #623)
- Hopefully fixed a problem causing players to be kicked from teams ( #618)
- Fixed problem causing '?' in an item name to break SQL commands ( #644)
- Fixed missingmessages.txt getting overwritten when the server restarts losing translated messages

Code improvements:
- Replaced equals/length with isEmpty ( #630) - Credit svaningelgem
- Replaced some uses of List with set (Warning developers, this may be a breaking change as class names are updated) ( #631) - Credit svaningelgem